Hi Kranthi,
Logon to the dev system or system where request was created.
Start tcode SE01
Enter your transport number and push the Action Log Button.
This action log will contain the name and date of the user who released the transport.
If that doesn't help pleas see below.
Table E070 contains the header data of your transport request.
Just open this table via SE16 in your development system and enter the transport number in field TRKORR.
Field AS4USER will contain the name of the user who released your transport because only the owner can release the transport request.
This table also contains the last change date, you will see that this date corresponds to the export date in your transport request
Hope it helps
Regards,
Deepanshu Sharma